Thought some of you might find this article interesting.
Possibly the most abundant bird ever to have existed, this gregarious pigeon once migrated in giant flocks that sometimes exceeded three billion, darkening the skies over eastern North America for days at a time. No wild bird in the world comes close to those numbers today. Yet 100 years ago this week, the very last pigeon of her kind died in her cage at the Cincinnati Zoo. Her name was Martha, and her passing merits our close attention today.